INDEX SLIP. 
Ayrton, Hertha.—Hie Mechanism of the Electric Arc. 
Phil. Trans., A, vol. 199, 1902, pp. 299-33G. 
Arc, Electric—Mechanism of. 
Ayrton, Hertha. Phil. Trans., A, vol. 199, 1902, pp. 299-336. 
Back Electromotive Force, apparent, of the Electric Arc—Its probable 
Cause. 
Ayrton, Hertha. Phil. Trans., A, vol. 199, 1902, pp. 299-336. 
Resistance, true, of the Electric Arc. 
Aybton, Hertha. Phil. Trans., A, vol. 199, 1902, pp. 299-336. 
